US 11,751,899 B2
Differential pressure motor and method for operating a differential pressure motor
Sebastian Vogt, Wehrheim (DE); and Thomas Kluge, Wehrheim (DE)
Assigned to Heraeus Medical GmbH, Wehrheim (DE)
Filed by Heraeus Medical GmbH, Wehrheim (DE)
Filed on May 13, 2020, as Appl. No. 15/931,170.
Claims priority of application No. 102019113640.7 (DE), filed on May 22, 2019.
Prior Publication US 2020/0367922 A1, Nov. 26, 2020
Int. Cl. A61B 17/3203 (2006.01); A61B 17/14 (2006.01); A61B 17/16 (2006.01); F04B 9/131 (2006.01); F15B 15/14 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/3203 (2013.01) [A61B 17/14 (2013.01); A61B 17/1628 (2013.01); A61B 17/1659 (2013.01); F04B 9/131 (2013.01); F15B 15/149 (2013.01); F15B 15/1414 (2013.01); A61B 2017/00398 (2013.01); A61B 2017/32035 (2013.01)] 32 Claims
OG exemplary drawing
 
1. A differential pressure motor comprising:
two working pistons each with a working surface;
a rod that connects the working pistons to each other and keeps them spaced apart from each other;
walls defining a hollow space that is at least partially cylindrical and in which the working pistons and the rod are movably disposed and having five complete openings;
a valve piston movably disposed between and against the working pistons, configured to be driven through thrusts of the working pistons against the valve piston, and movable in the hollow space,
wherein the valve piston with the five complete openings forms a 2/5-way valve with which an alternate impact of a first pressure and a second pressure on the working surfaces of the working pistons is controllable when the first pressure and the second pressure are applied to three of the five complete openings such that a periodic movement of the working pistons and the rod is created in the hollow space, which drives a periodic movement of the valve piston.